WO2024060679A1

WO2024060679A1 - Elastic cushion and body support cushion

Info

Publication number: WO2024060679A1
Application number: PCT/CN2023/098198
Authority: WO
Inventors: 吴玲; 芮正国; 李铭豪; 张春武
Original assignee: 裕克施乐塑料制品（太仓）有限公司
Priority date: 2022-09-21
Filing date: 2023-06-05
Publication date: 2024-03-28
Also published as: CN115590333A

Abstract

An elastic cushion and a body support cushion. The elastic cushion comprises an elastic main body (10) made of a thermoplastic elastomer, a plurality of elastic support portions are formed on the elastic main body (10), the elastic support portions are at least divided into comfort portions (100e) and support portions (100f) in an XYZ three-axis coordinate system, and the porosity of the comfort portions (100e) is greater than the porosity of the support portions (100f). By means of the layout of different elastic support portions, the required support force can be provided, and the formed comfort portions can meet the needs for softness and comfort; in addition, the air permeability of the elastic main body of a lattice structure can be maintained to avoid stuffiness.

Description

Elastic pad and human body support pad

This disclosure claims priority from the Chinese patent application with application number CN202211154085.X filed on September 21, 2022.

Technical field

The present disclosure belongs to the field of daily necessities, specifically relates to an elastic pad, and also relates to a human body support pad based on the elastic pad.

Background technique

In many situations where cushioning and support are required, such as seat cushions or back cushions, mattresses, sofa cushions and other products, it is necessary to use elastomers with high strength, high elasticity (compression resistance), high impact resistance and light weight.

At present, elastomers formed by 3D printing using thermoplastic powder as raw material have been used in many occasions because of their advantages such as simple molding process, environmental protection, high raw material utilization, recyclability, and high precision.

However, in order to meet the needs of mechanical properties and breathability, the porosity of the elastomer is smaller and remains equal. Therefore, when used as an elastic pad, it has the following defects:

1. Since the elastic force provided by the elastomer is relatively balanced, there is no distinction between soft and hard. Therefore, after the elastic pad is stressed, it will either be too concave, causing a large deformation area and affecting breathability; or the deformation will be too small, resulting in insufficient comfort. ;

2. Due to factors such as melt shrinkage, weak bonding between powder particles, and many voids, its mechanical properties (such as compression resistance) cannot meet the needs of use. To enhance the compression resistance of elastomers, the main method is That is to increase the thickness of the elastomer, so the volume of the elastic pad formed is large.

Contents of the invention

One invention of the present disclosure relates to an improved elastic pad.

Another aspect of the present disclosure relates to a body support pad.

The first invention of the present disclosure provides an elastic pad, including: the elastic pad includes an elastic body made of thermoplastic elastomer, and a plurality of elastic support parts are formed on the elastic body, and the elastic support parts are located at XYZ three The axial coordinate system is divided into at least a comfort part and a support part, and the porosity of the comfort part is greater than the porosity of the support part.

In some embodiments, the softness of the comfort portion is greater than the softness of the support portion.

In some embodiments, the elastic body has a porosity of 5% to 40%.

In some embodiments, the elastic pad further includes an elastic resin layer formed on the elastic body, the elastic resin layer is at least formed in the internal pores of the elastic body and combined with the elastic body, The elastic body and the elastic resin layer form a unit cell structure.

In short, the elastic body of the lattice structure is combined with the elastic resin or the raw material forming the elastic resin and the resin curing agent. When the treatment liquid is fully contacted and heated to solidify, the elastic resin will form an elastic resin layer in the internal pores of the elastic body with a lattice structure and on the outer surface of the elastic body with a lattice structure. The elastic resin and the elastic body with a lattice structure solidify, bond, and combine. , filling the internal pores of the lattice structure elastomer, thereby obtaining a unit cell structure with excellent mechanical properties. Under the same weight, the unit cell structure has higher compression resistance; under the conditions of achieving the same compression performance, the material has a lower weight. In addition, the elastic resin layer located on the outer surface of the elastic body of the lattice structure can reduce the surface roughness of the material, making the surface of the unit cell structure smooth.

In some embodiments, the elastic resin layer is further formed on the outer surface of the elastic body, or/and the pressure required when the unit cell structure is compressed to a deformation of 50% is greater than 270N.

In some embodiments, the elastic resin constituting the elastic resin layer has a hardness of greater than 50A Shore hardness and less than 40D Shore hardness, a viscosity of less than 12000 cP at 25° C., a tensile strength of greater than 5 MPa, and an elongation at break of greater than 120%.

In some embodiments, the mass of the elastic resin layer is 10% to 50% of the mass of the elastic body of the lattice structure; and/or the density of the elastic body is 0.7-1.1g/cm ³ .

In some embodiments, the unit cell structure is formed by the elastic body coated with a treatment liquid, and the treatment liquid includes elastic resin or its raw materials and curing agent.

In some embodiments, the treatment liquid is sprayed, dip-coated or electroplated on the elastic body, and the treatment liquid penetrates into the internal pores of the elastic body.

In some embodiments, the coating treatment time is 5-20 min, and the heating treatment time is 3-12 h.

In some embodiments, the mass concentration of the elastic resin in the treatment liquid is 30-60%, and the mass concentration of the curing agent is 1%-10%. In some specific embodiments, the mass concentration of the elastic resin in the treatment liquid is 40-55%, and the mass concentration of the curing agent is 2%-5%.

In some embodiments, the heating and curing is performed at a temperature of 80° C. to 100° C., and the coating process and heating and curing are performed once, or are repeated 1 to 3 times after one session.

In addition, the resin constituting the thermoplastic elastomer is one or a combination of two selected from thermoplastic polyurethane resin and thermoplastic polyethylene resin.

In some embodiments, the elastic resin constituting the elastic resin layer is a combination of one or more selected from polyurethane resin, acrylic resin, and silicone resin.

That is to say, the lattice structure elastic body is prepared by 3D printing. By adjusting parameters such as 3D printing temperature and laser energy, the sintering density and porosity of the lattice structure elastic body can be controlled, thereby controlling the depth and quality of elastic resin penetration. The lower the temperature and laser power, the higher the porosity of the elastic body of the printed lattice structure, the higher the content of elastic resin in the unit cell structure, and the better the compression resistance of the unit cell structure.

In some embodiments, the parameters used are as follows: temperature is 80-140°C, laser power is 30-100W, scanning rate is 4000-12000mm/s, and scanning spacing is 0.1-0.3mm.

At the same time, there are no special restrictions on the lattice cell structure that constitutes the elastic body of the lattice structure. Lattice cell structures can be common Cube, star, octagon, hexagon, rhombus and tetrahedron etc.

In some embodiments, the comfort part and the support part are arranged sequentially along the thickness direction of the elastic body, wherein the unit cell structure of the comfort part and the unit cell structure of the support part are The cell sizes are the same, or the cells of the unit cell structure of the comfort part are smaller than the cells of the unit cell structure of the support part, and/or the cell rod diameter of the unit cell structure is from The support part gradually becomes smaller toward the comfort part, and/or the cell shape of the unit cell structure of the comfort part is different from the cell shape of the unit cell structure of the support part.

In some embodiments, the comfort portion and the support portion are arranged sequentially along the width direction of the elastic body, wherein the cell size of the unit cell structure gradually becomes smaller from the comfort portion toward the support portion. , and/or, the cell rod diameter of the unit cell structure gradually becomes smaller from the support part to the comfort part.

In some embodiments, the elastic body includes a square inner core and a core sleeve formed on the outer periphery of the inner core, and the elastic resin layer is formed on the inner core or/and the core sleeve.

In some embodiments, the core casing includes an upper casing layer, a lower casing layer, a front casing layer and a rear casing layer, wherein the upper casing layer and the lower casing layer are symmetrically arranged, and the front casing layer and the rear casing layer are symmetrically arranged. Set; or/and, the porosity of the upper casing layer is less than or equal to the porosity of the inner core, and the porosity of the front casing layer is greater than or equal to the porosity of the upper casing layer.

In some embodiments, the elastic body is prepared by 3D printing, and the elastic body is configured such that changes in one or more parameters thereof can adjust the porosity of various parts of the elastic body, the parameters including 3D printing temperature. and laser power.

In some embodiments, the elastic cushion is a seat cushion or an armrest cushion, wherein the comfort part and the support part are arranged from top to bottom.

In some embodiments, the elastic cushion is a backrest cushion, and the backrest cushion has a plurality of elastic support parts, which are respectively a lumbar support part and a back support part. The lumbar support part and the back support part are arranged along the Arranged in the up and down direction and provided integrally, in any elastic support part of the back cushion, the comfort part and the support part are arranged from front to back.

In some embodiments, the elastic pad is a backrest pad, and the backrest pad has a plurality of the elastic support parts, which are a left backrest and a right backrest respectively. The left backrest and the right backrest are separately arranged, and the left backrest and the right backrest each include a support part and two comfort parts respectively arranged on the left and right sides of the support part.

In some embodiments, the elastic cushion is a headrest cushion, and the headrest cushion includes one support part and two comfort parts, and the two comfort parts are provided on the headrest part. the upper and lower sides.

In some embodiments, the elastic cushion is a seat cushion, and the seat cushion has a plurality of elastic support parts, which are respectively a rear support part, a middle support part, and a front support part distributed sequentially along the length direction, wherein, the The thickness of the seat cushion increases sequentially from back to front, and the porosity of the rear support part, the middle support part, and the front support part gradually becomes larger.

In some embodiments, in the side projection of the seat cushion, the front support body and the rear support body are located at the left and right ends respectively, wherein the right side contour edge of the rear support body is inward from top to bottom. and are arranged to be continuously bent outward; and/or the left contour edge of the front support part is a rounded transition; and/or the upper and lower contour edges of the middle support part are arranged symmetrically with respect to the middle part , and the upper contour edge and the lower contour edge respectively extend linearly and obliquely from left to right.

In some embodiments, the elastic pad is a seat cushion, which has a plurality of elastic support parts, namely a rear support part, a middle support part, and a front support part distributed in sequence along the length direction, wherein the thickness of the rear support part, the middle support part, and the front support part are equal, and/or the rear support part, the middle support part, and the front support part all include a plurality of the support parts along the thickness direction, and the porosity of the support parts gradually increases from bottom to top.

In some embodiments, the front support portion bends forward and downward; the elastic support force formed by the rear support portion is greater than the elastic support force formed by the front support portion, and the elastic support force formed by the front support portion Less than or equal to the elastic support force formed by the middle support portion.

In some embodiments, the elastic pad includes a comfort part located at the upper part and a support part located at the lower part; or, the elastic pad includes the comfort part located at the upper part, the support part located at the middle part, and the support part located at the lower part. Another said support part.

Another aspect of the present disclosure provides a human body support cushion, which includes the elastic cushion as described above, and there are one or more elastic cushions.

In some embodiments, the human body support cushion is an office chair cushion or a car seat cushion, wherein the office chair cushion includes seat cushions and back cushions with different elastic support forces; and the car seat cushion includes seat cushions and back cushions with different elastic support forces. Powerful headrest cushions, backrest cushions, and seat cushions.

In some embodiments, the seat cushion includes a comfort part and a support part arranged from top to bottom. The cells of the unit cell structure formed by the comfort part and the support part have the same size, and the cells of the unit cell structure formed from the bottom up are the same. The cell rod diameter of the cellular structure gradually becomes smaller.

In some embodiments, the back cushion includes a lumbar support portion and a back support portion, wherein the lumbar support portion and the back support portion are integrally arranged up and down to form a whole back cushion or to form a left back and a right backrest that are symmetrical on the left and right. The cell sizes of the crystal cell structure formed by the back cushion are the same, and the cell rod diameter of the crystal cell structure formed from the back to the front gradually decreases; the left back cushion includes a support portion located in the middle and a comfort portion located on both sides of the support portion, and the cell size of the crystal cell structure gradually increases and the cell rod diameter gradually decreases from the middle to both sides.

In some embodiments, the office chair cushion further includes a headrest cushion formed above the backrest cushion. The headrest cushion includes a support portion located in the middle, comfort portions located on both sides of the support portion, and from the middle to both sides. The cell size of the unit cell structure gradually becomes larger and/or the cell rod diameter gradually becomes smaller.

In some embodiments, the headrest pad includes a support portion and a comfort portion integrally formed from back to front, wherein the cell size of the crystal cell structure formed by the comfort portion is smaller than the cell size of the crystal cell structure formed by the support portion, and the porosity of the comfort portion is greater than the porosity of the support portion.

In some embodiments, the backrest cushion includes a lumbar support part and a back support part arranged one above the other, the cells of the unit cell structures of the back support part and the lumbar support part have the same size, and the back support part and the back support part have the same size. The cell structure formed by the lumbar support part from back to front has different cell rod diameters.

In some embodiments, the seat cushion sequentially forms a rear support part, a middle support part, and a front support part along its length direction, where the thickness gradually increases from back to front, and the rear support part, the middle support part, and the front support part The porosity formed by the three supporting parts gradually becomes larger.

In some embodiments, in the side projection formed by the end face of the seat cushion in the length direction, the front support portion and the rear support portion are respectively located at the left and right ends, wherein the right side contour edge of the rear support portion is continuously bent inward and outward from top to bottom; and/or, the left side contour edge of the front support portion is rounded in transition; and/or, the upper side contour edge and the lower side contour edge of the middle support portion are symmetrically arranged about the middle part, and the upper side contour edge and the lower side contour edge respectively extend straight and inclined from left to right.

In some embodiments, the seat cushion includes a front support part, a middle support part, and a rear support part sequentially formed along its length direction, wherein the thicknesses of the rear support part, the middle support part, and the front support part are equal; or/and, so The rear support part, the middle support part and the front support part are respectively divided into multiple layers of support parts in the thickness direction, and the cell rod diameter of the unit cell structure formed by each layer of support parts gradually becomes smaller from bottom to top; or/and, from bottom to top, The porosity of the lattice structure formed from bottom to top gradually becomes larger.

In some embodiments, the front support portion bends forward and downward; the elastic support force formed by the rear support portion is greater than the elastic support force formed by the front support portion, and the elastic support force formed by the front support portion is less than or Equal to the elastic support force formed by the middle support part.

In some embodiments, the office chair cushion or car seat cushion further includes an armrest cushion, which includes a comfort part and a support part arranged from top to bottom, wherein the cell rods of the unit cell structure are formed from bottom to top. The diameter gradually becomes smaller; or/and the porosity of the lattice structure formed from bottom to top gradually becomes larger; or/and the office chair cushion or car seat cushion further includes a structure formed on both sides of the seat cushion part. A temple pad, wherein the temple pad structure is the same as the armrest pad structure.

In some embodiments, the human body support cushion is a sofa cushion or a mattress, and the sofa cushion or mattress includes a comfort part located at the upper part and a support part located at the lower part. The crystal formed by the comfort part and the support part The cell shapes of the cellular structure are different, and the cell rod diameter gradually becomes smaller from bottom to top; or, the sofa cushion or mattress includes a support part located in the middle and a comfort part located at the upper and lower parts of the support part. The unit cell structure formed by the comfort part and the support part has different cell shapes, and the cell rod diameter of the unit cell structure located in the middle is larger than the cell rod diameter of the upper or lower unit cell structure.

Due to the implementation of the above technical solutions, the present disclosure has the following advantages compared with the prior art:

In the elastic pad of the present disclosure, several different elastic support parts are formed on the elastic body. Through the layout of the different elastic support parts, not only the required support force can be provided, but the formed comfort part can provide softness and comfort. At the same time, The elastic body of the lattice structure can maintain its own breathability and avoid stuffiness.

The human body support pad made of the above-mentioned elastic pad can be laid out according to the deformation difference of each elastic support part at the same time, and can meet the personalized needs in different application scenarios.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a lattice structured elastomer in Example 1;

Figure 2 is a schematic three-dimensional structural diagram of the car seat in Embodiment 2;

Figure 3 is a schematic structural diagram of the seat cushion on the car seat of Figure 2;

Figure 4 is a schematic front view of the seat cushion in Figure 3;

Figure 5 is a schematic front view (1) of the seat cushion in Embodiment 2;

Figure 6 is a schematic front view (2) of the seat cushion in Embodiment 2;

Figure 7 is a schematic front view (3) of the seat cushion in Embodiment 2;

Figure 8 is a schematic front view (4) of the seat cushion in Embodiment 2;

Figure 9 is a schematic top view of Figure 8;

Figure 10 is a schematic three-dimensional structural diagram (1) of the office chair in Embodiment 3;

Figure 11 is a schematic three-dimensional structural diagram (2) of the office chair in Embodiment 4;

Figure 12 is a schematic three-dimensional structural diagram of the mattress in Embodiment 5;

Figure 13 is a schematic three-dimensional structural diagram of the sofa cushion in Embodiment 6;

Among them: 1. Unit cell structure; 10. Elastic body; 10a, front support part; 10b, middle support part; 10c, rear support part; 100, inner core; 101, core sleeve; a, upper sleeve layer; b, lower Cover layer; c, front cover layer; d, rear cover layer; z, support layer; z1, upper support layer; z2, middle support layer; z3, lower support layer; ①, headrest cushion; ②, backrest cushion; ③ , seat cushion; ④, side support cushion; 100a, support part; 100b, comfort part; 100c, lumbar support part; 100d, back support part; 100e, comfort part; 100f, support part; A, headrest cushion; B, seat cushion ;C, backrest cushion; 1h, comfort part; 1f, support part; 1g, lumbar support part; 1t, back support part; 1k, backrest cushion; 1L, left backrest; 1R, right backrest.

Detailed ways

In order to make the above-mentioned purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure. However, the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present disclosure, so the present disclosure is not limited by the specific embodiments disclosed below.

Example 1

The elastic pad of this embodiment includes an elastic body 10 made of thermoplastic elastomer. Several elastic support parts are formed on the elastic body 10. The elastic support parts are at least divided into comfort parts and support parts in the XYZ three-axis coordinate system. , where the softness of the comfort part is greater than the softness of the support part.

As shown in Figure 1, the elastic body 10 includes a comfort part 100e and a support part 100f layered up and down. The cells of the unit cell structure formed by the comfort part 100e and the support part 100f have the same size, and the unit cell structure is formed from bottom to top. The cell rod diameter gradually becomes smaller.

Specifically, the porosity of the comfort part 100e is greater than the porosity of the support part 100f, and the porosity of the formed elastic body 10 is 5% to 40%.

In this example, thermoplastic polyurethane TPU is used as raw material, and an elastic body with a lattice structure is 3D printed through powder sintering. The process parameters include a main temperature of 100-120°C, a laser power of 50W, and a scanning rate of 4000-1000mm/s. The spacing is 0.2mm. At the same time, the pressure required when the elastic body 10 is compressed to a deformation of 50% is greater than 150N.

Example 2

As shown in Figure 2, the human body support cushion of this embodiment is a chair cushion provided on a car seat. The chair cushion is provided with a plurality of elastic pads, namely a headrest cushion ①, a backrest cushion ②, and a seat cushion ③.

Specifically, the elastic pad constituting each part of the seat cushion includes a unit cell structure 1, and the unit cell structure 1 includes an elastic body 10 and an elastic resin layer.

The elastic body 10 is made of thermoplastic elastomer, which has a lattice structure, and each unit cell structure 1 forming the chair cushion forms different elastic supporting forces.

The elastic body 10 has a porosity of 10% to 30% and is 3D printed through powder sintering.

The elastic resin layer is partially formed in the internal pores of the elastic body 10 and combined with the elastic body 10 , and the remaining part is formed on the outer surface of the elastic body 10 . In this way, the pressure required when the unit cell structure 1 constituting each part of the chair cushion is compressed to a deformation of 50% is greater than 270N.

The elastic resin constituting the elastic resin layer has a hardness of 50A Shore hardness or more and 40D Shore hardness or less, a viscosity at 25° C. of less than 12,000 cP, a tensile strength of 5 MPa or more, and an elongation at break of 120% or more.

The mass of the elastic resin layer is 20% to 25% of the mass of the elastic pad. Improve the strength, elasticity, and impact resistance of the unit cell structure, and optimize the weight reduction while ensuring sufficient elastic buffering capacity.

The lattice-structured elastic body is prepared by 3D printing. By adjusting parameters such as 3D printing temperature and laser energy, the sintering density and porosity of the lattice structure elastic body can be controlled, thereby controlling the depth and quality of elastic resin penetration. The lower the temperature and laser power, the higher the porosity of the printed elastic pad, the higher the content of elastic resin in the unit cell structure, and the better the compression resistance of the unit cell structure.

In some specific implementations, the parameters used are as follows: temperature is 80-140°C, laser power is 30-100W, scanning rate is 4000-10000mm/s, and scanning spacing is 0.1-0.3mm.

In this example, the elastic pad includes an elastic body 10 made of thermoplastic elastomer. Several different elastic support parts are formed on the elastic body 10. The elastic support part is at least divided into a comfort part and a support part in the XYZ three-axis coordinate system. , the softness of the comfort part is greater than the softness of the support part.

Specifically, the elastic body 10 in the headrest cushion ① includes a support part 100a and a comfort part 100b that are integrally formed from back to front, where the cell size of the unit cell structure formed by the comfort part 100b is smaller than that of the unit cell structure formed by the support part 100a The cell size is , and the porosity of the comfort part 100b is greater than the porosity of the support part 100a. That is to say, the user's head first contacts the comfort part 100b, and provides comfortable elastic support under the common elastic support formed by the support part 100a and the comfort part 100b.

The elastic body 10 in the backrest cushion ② includes a lumbar support part 100c and a back support part 100d arranged in an upper and lower position. The cell size of the unit cell structure of the back support part 100d and the lumbar support part 100c is the same, and the cell rod diameters of the unit cell structure formed by the back support part 100d and the lumbar support part 100c from back to front are different. In other words, the different elastic supports provided by the lumbar support part 100c and the back support part 100d, in general, the support force formed by the back support part 100d is definitely greater than the support force formed by the lumbar support part 100c, but it should be noted that the back support part 100d is harder than the lumbar support part 100c, so as to provide a cushion that fits the lumbar curve.

As shown in Figure 3 and Figure 4, the elastic body 10 in the seat cushion ③ includes a comfort part 100e and a support part 100f layered up and down. The cells of the unit cell structure formed by the comfort part 100e and the support part 100f are the same size, and are formed from the bottom to the bottom. The cell rod diameter of the unit cell structure formed above gradually becomes smaller.

In this example, there are side support pads ④ on both sides of the seat cushion ③. The side support pads ④ on both sides are arranged symmetrically, and the elastic body 10 in the side support pad ④ is the same as the seat cushion ③.

As shown in Figure 5, the elastic body 10 in the seat cushion ③ includes a front support part 10a, a middle support part 10b, and a rear support part 10c sequentially formed along its length direction.

Specifically, the thickness of the elastic body 10 gradually increases from back to front, and the porosity formed by the rear support part 10c, the middle support part 10b, and the front support part 10a gradually becomes larger. The support force formed in this way provides different elastic support as different parts apply force to meet the comfort needs of different people. Under high-intensity support, it ensures its own breathability, effectively improves the heat dissipation performance of the seat cushion, and relieves stuffiness.

Specifically, after the elastic resin layer is formed on the front support part, the pressure required when it is compressed to a deformation of 50% is greater than 200N.

At the same time, in the side projection formed by the end surface of the elastic body 10 in the length direction, the front support part 10a and the rear support part 10c are located at the left and right ends respectively, in which the left contour edge of the front support part 10a is a rounded transition; the rear support part The right contour edge of 10c is continuously bent inward and outward from top to bottom.

The upper outline edge and the lower outline edge of the middle support part 10b are arranged symmetrically with respect to the middle part, and the upper outline edge and the lower outline edge respectively extend linearly and obliquely from left to right. The comfort created in this way can better meet the comfort of different groups of people.

As shown in Figure 6, the elastic body 10 in the seat cushion ③ includes a square inner core 100, a core sleeve 101 formed on the outer periphery of the inner core 100, and the pressure required when the unit cell structure 1 is compressed to a deformation of 50%. Greater than 270N.

The core sleeve 101 comprises an upper sleeve layer a, a lower sleeve layer b, a front sleeve layer c and a rear sleeve layer d, wherein the upper sleeve layer a and the lower sleeve layer b are symmetrically arranged, and the front sleeve layer c and the rear sleeve layer d are symmetrically arranged.

The porosity of the upper casing layer a is equal to the porosity of the inner core 100, and the porosity of the front casing layer c is greater than the porosity of the upper casing layer a. Further improves breathability and provides comfortable support.

As shown in Figure 7, in the elastic body 10 of cushion ③, the porosity of the upper cover layer a is smaller than the porosity of the inner core 100, and the porosity of the front cover layer c is equal to the porosity of the upper cover layer a. Further improves breathability and provides comfortable support.

As shown in Figure 8, the elastic cushion 10 in the seat cushion ③ includes a rear support part 10c, a middle support part 10b, and a front support part 10a sequentially formed along its length direction, wherein the rear support part 10c, the middle support part 10b, and the front support part The thicknesses of the portions 10a are equal.

The rear support part 10c, the middle support part 10b, and the front support part 10a are respectively divided into multiple layers of support parts z from the thickness direction, and the porosity of each layer of support parts z gradually becomes larger from bottom to top.

As shown in Figure 9, the support part z has three layers (upper, middle and lower) (upper support part z1, middle support part z2, lower support part z3), and the thickness of the rod diameter formed by each layer of support parts gradually becomes larger from bottom to top. set up.

The front support part 10a bends forward and downward; the elastic support force formed by the rear support part 10c is greater than the elastic support force formed by the front support part 10a, and the elastic support force formed by the front support part 10a is equal to the elastic support force formed by the middle support part 10b .

After the elastic resin layer is formed on the front support part 10a, the pressure required when it is compressed to a deformation of 50% is greater than 200N.

In addition, the cell shape of the lattice cell structure constituting the elastic body 10 is not particularly limited.

At the same time, the molding process of the headrest cushion ①, backrest cushion ②, seat cushion ③, and side support cushion ④ is the same. Here, the seat cushion ③ is formed as As an example, the cushion ③ forming process includes the following steps:

1) Using thermoplastic polyurethane TPU as raw material, an elastic body with a lattice structure is 3D printed through powder sintering. The process parameters are: main temperature 100-120°C, laser power 50W, scanning rate 4000-1000mm/s, and scanning spacing 0.2mm .

2) 94 parts by mass of a commercially available polyurethane resin solution with a mass concentration of 45% and 6 parts by mass of an isocyanate curing agent were mixed and dispersed evenly with a high-speed stirrer to obtain an impregnation treatment liquid, wherein the polyurethane resin had a hardness of 60A, a viscosity of 8000 cP at 25°C, a tensile strength of 10 MPa, and an elongation at break of 200%.

3) The printed elastic body of the lattice structure is immersed in the impregnation treatment solution prepared in step 2) for 8 minutes, taken out and dried, and then placed in a vacuum oven at 80±2° C. for curing for 2.5 hours to obtain a composite material sample.

The sintering density and porosity of the lattice structure elastic body obtained at different scanning rates, as well as the weight of the lattice structure elastic body before and after polyurethane resin treatment, and the pressure at 50% compression deformation (rear, middle and front parts average value of the support), as shown in Table 1 below:

Table 1

It can be seen from Table 1 above that by controlling the process parameters of 3D printing, the sintering density and porosity of the lattice structure elastic body can be adjusted. The greater the porosity, the more polyurethane resin content in the unit cell structure, and the resistance of the composite elastomer material. The compression performance improves the more.

Example 3

As shown in Figure 10, the human body support cushion of this embodiment is a chair cushion provided on an office chair. The chair cushion is provided with multiple elastic pads, including seat cushion B and back cushion C with different elastic support forces.

Both the seat cushion B and the backrest cushion C include a unit cell structure 1, and the unit cell structure 1 includes an elastic body 10 and an elastic resin layer.

The elastic body 10 of the seat cushion B includes a comfort part 1h and a support part 1f arranged from top to bottom. The cells of the unit cell structure formed by the comfort part 1h and the support part 1f are the same size, and the cells of the unit cell structure formed from the bottom up are the same. The cell rod diameter gradually becomes smaller.

The elastic body 10 of the backrest cushion C includes a lumbar support part 1g and a back support part 1t, wherein the lumbar support part 1g and the back support part 1t are integrally provided up and down and form an integral backrest cushion.

The cells of the unit cell structure formed by the backrest pad have the same size, and the cell rod diameters of the unit cell structure formed from the back to the front gradually become smaller.

The office chair also includes a headrest pad A formed on the backrest cushion. The elastic body 10 of the headrest pad A includes a support part 1f in the middle, comfort parts 1h on both sides of the support part 1f, and unit cells from the middle to both sides. The structure has progressively larger cell sizes and/or smaller cell rod diameters.

At the same time, the molding process of headrest cushion A, seat cushion B, and backrest cushion C is the same. Taking the molding of cushion B as an example, the molding process of cushion B includes the following steps:

1) Using thermoplastic polyurethane TPU as raw material, an elastic body with a lattice structure is 3D printed through powder sintering. The process parameters are as follows: main temperature 100-120°C, laser power 80W, scanning rate 8000mm/s, and scanning spacing 0.2mm;

2) Mix 98 parts by mass of a commercially available acrylic resin solution with a mass concentration of approximately 55% and 2 parts by mass of the curing agent 4,4'-methylenebis(2-methylcyclohexylamine) with a high-speed mixer to disperse evenly. An impregnation treatment liquid was obtained, in which the hardness of the acrylic resin was 70A, the viscosity at 25°C was 10000cP, the tensile strength was 12MPa, and the elongation at break was 180%;

3) Soak the printed elastic body of the TPU lattice structure in the dipping treatment solution for 10 minutes, take it out and spin dry, and then place it in an 80°C vacuum oven for curing for 5 hours to obtain a unit cell structure sample;

4) Place the cured sample into the immersion treatment solution again, soak for 10 minutes, spin dry, and solidify.

That is to say, two elastic resin layers are formed on the surface of the elastic body of the lattice structure in the formed unit cell structure 1. At the same time, the weight of the unit cell structure 1 is increased from 865g before treatment to 1068g, and the material is compressed and deformed by 50%. The pressure increased from 270.1N before treatment to 577.3N. The density of the prepared unit cell structure is 1.003g/cm ³ .

Example 4

As shown in FIG. 11 , the elastic pad of this embodiment is a chair cushion arranged on an office chair (without a headrest), and a plurality of elastic pads are arranged on the chair cushion, namely a seat cushion B and a backrest cushion C with different elastic supporting forces.

Specifically, the elastic cushion 10 of the seat cushion B includes a comfort part 1h and a support part 1f arranged from top to bottom. The cells of the unit cell structure formed by the comfort part 1h and the support part 1f have the same size, and the cells formed from the bottom up are the same. The cell rod diameter of the cellular structure gradually becomes smaller.

The elastic main body 10 of the back cushion C includes a lumbar support portion 1g and a back support portion 1t. The lumbar support portion 1g and the back support portion 1t are integrally provided up and down, and form a left-right symmetrical left backrest 1L and a right backrest 1R.

The left backrest 1L includes a support portion 1f located in the middle and comfort zones 1h located on both sides of the support portion 1f. From the center to both sides, the cell size of the unit cell structure gradually becomes larger and the cell rod diameter gradually becomes smaller.

At the same time, the molding process of seat cushion B and backrest cushion C is the same, and the following takes the molding of seat cushion B as an example. The molding process of seat cushion B includes the following steps:

3) Soak the printed TPU lattice structure elastic body in the dipping treatment solution for 10 minutes, take it out and spin dry, and then place it in an 80°C vacuum oven to solidify for 5 hours to obtain a unit cell structure sample;

4) Place the cured sample into the immersion treatment solution again, soak for 10 minutes, spin dry, and solidify;

5) Repeat step 4) once.

That is to say, during the molding process of the unit cell structure 1, three elastic resin layers are formed on the surface of the elastic body of the lattice structure in the formed unit cell structure 1. At the same time, the weight of the unit cell structure 1 is increased from 924g before processing to 1136g. , when the material compression deformation is 50%, the pressure increases from 290.1N before treatment to 650.5N. The density of the prepared unit cell structure is 1.099g/cm ³ .

Example 5

As shown in Figure 12, the human body support pad of this embodiment is a mattress. The mattress includes a unit cell structure 1. The unit cell structure 1 includes an elastic body 10 and an elastic resin layer.

Specifically, the elastic body 10 has a comfort portion 1h and a support portion 1f with different elastic supporting forces.

The comfort part 1h is located above the support part 1f, and the unit cell structure formed by the comfort part 1h and the support part 1f has different cell shapes, and at the same time, the cell rod diameter gradually becomes smaller from bottom to top.

At the same time, the mattress forming process includes the following steps:

1) Using thermoplastic polyurethane TPU as raw material, the elastic body with a lattice structure is 3D printed through powder sintering. The process parameters are as follows: main temperature 100-120°C, laser power 80W, scanning rate 8000mm/s, and scanning spacing 0.2mm;

5) Repeat step 4) once.

That is to say, during the molding process of the unit cell structure 1, three elastic resin layers are formed on the surface of the elastic body of the lattice structure in the formed unit cell structure 1. At the same time, the weight of the unit cell structure 1 is increased from 9200g before processing to 11224g. , when the material compression deformation is 50%, the pressure increases from 450.2N before treatment to 990.2N. The density of the prepared unit cell structure is 1.012g/cm ³ .

Example 6

As shown in Figure 13, the human body support cushion of this embodiment is a sofa cushion. The sofa cushion includes a unit cell structure 1. The unit cell structure 1 includes an elastic body 10 and an elastic resin layer.

Specifically, the elastic body 10 has a comfort part 1h and a support part 1f with different elastic support forces.

In this example, along the thickness direction of the elastic body 10, the supporting part 1f is located in the middle, and the comfortable part 1h is located at the upper and lower parts of the supporting part 1f. The comfortable part 1h and the supporting part 1f form a unit cell structure with different cell shapes. and located in the middle The cell rod diameter of the unit cell structure is larger than the cell rod diameter of the upper or lower unit cell structure.

At the same time, the sofa cushion forming process includes the following steps:

5) Repeat step 4) once.

That is, during the molding process of the unit cell structure 1, three elastic resin layers are formed on the surface of the elastic body 10 in the unit cell structure 1. At the same time, the weight of the unit cell structure 1 is increased from 4600 g before the treatment to 5300 g, and the pressure when the material is compressed by 50% is increased from 350.5 N before the treatment to 656.3 N. The density of the prepared unit cell structure is 1.012 g/cm ³ .

Therefore, the present disclosure has the following advantages:

1. Through the layout of different elastic support parts, the present disclosure can not only provide the required support force, but also form a comfortable part that can provide softness and comfort. At the same time, through the design of porosity, it ensures its own breathability and relieves stuffiness;

2. The present disclosure uses the composite of the lattice structure elastic body and the elastic resin coating to allow the elastic resin to penetrate into the internal pores of the lattice structure elastic body and tightly combine the two. Unexpectedly, the elasticity of the lattice structure is not affected. On the premise of the main advantageous performance, the compression resistance of the material is significantly improved, while the volume of the material remains unchanged and the weight only increases slightly. Compared with the lattice structure elastic body without composite elastic resin coating, when achieving the same compression resistance, the volume of the unit cell structure of the present disclosure is significantly smaller and the weight is significantly lighter; when the weight is the same, the lattice structure of the present disclosure has the same weight. The compression resistance of the cell structure is significantly higher;

3. The preparation process of the unit cell structure of the present disclosure uses 3D printing to prepare the elastic body of the lattice structure, and adopts coating processing and curing processes. On the one hand, the lattice structure can be controlled by adjusting parameters such as 3D printing temperature and laser power. The sintering density and porosity of the elastic body then controls the depth and quality of elastic resin penetration, and ultimately controls the degree of improvement in the compression performance of the unit cell structure. Therefore, unit cell structures with various properties can be flexibly prepared to meet various application scenarios. individual needs. On the other hand, by adopting coating treatment and curing process, the elastic body of the lattice structure and the elastic resin coating are more fully and tightly combined, which helps to improve the strength and service life of the unit cell structure.

The endpoints of ranges and any values disclosed herein are not limited to the precise range or value, but these ranges or values are to be understood to include values approaching such ranges or values. For numerical ranges, the endpoint values of each range, the endpoint values of each range and individual point values, and the individual point values can be combined with each other to obtain one or more new numerical ranges. These values The scope shall be deemed to be specifically disclosed herein.

Claims

An elastic pad, characterized in that: the elastic pad includes an elastic body made of thermoplastic elastomer, and a plurality of elastic support parts are formed on the elastic body, and the elastic support parts are at least one in the XYZ three-axis coordinate system. It is divided into a comfortable part and a supporting part, and the porosity of the comfortable part is greater than the porosity of the supporting part.
The elastic pad according to claim 1, wherein the softness of the comfort part is greater than the softness of the support part.
The elastic pad according to claim 1, wherein the elastic body has a porosity of 5% to 40%.
The elastic pad according to any one of claims 1 to 3, characterized in that: the elastic pad further includes an elastic resin layer formed on the elastic body, and the elastic resin layer is formed on at least one side of the elastic body. in the internal pores and combined with the elastic body.
The elastic pad according to claim 4, wherein the elastic resin layer is also formed on the outer surface of the elastic body.
The elastic pad according to claim 4, characterized in that: the hardness of the elastic resin constituting the elastic resin layer is above 50A Shore hardness and below 40D Shore hardness, the viscosity at 25°C is less than 12000cP, and the tensile strength is More than 5MPa, the elongation at break is more than 120%.
The elastic pad according to claim 4, characterized in that: the mass of the elastic resin layer is 10% to 50% of the mass of the elastic body; and/or the density of the elastic body is 0.7-1.1g/ cm 3 .
The elastic pad according to claim 4, wherein the elastic body and the elastic resin layer form a unit cell structure, and the pressure required when the unit cell structure is compressed to a deformation of 50% is greater than 270N.
The elastic pad according to claim 8, characterized in that the unit cell structure is formed by the elastic body coated with a treatment liquid, and the treatment liquid contains elastic resin or its raw materials and curing agent.
The elastic pad according to claim 9, wherein the treatment liquid is sprayed, dip-coated or electroplated on the elastic body, and the treatment liquid penetrates into the internal pores of the elastic body.
The elastic pad according to claim 9, characterized in that: the mass concentration of the elastic resin in the treatment liquid is 30%-60%, the mass concentration of the curing agent is 1%-10%, and the mass concentration is heated and cured after coating. The heating and curing is performed at a temperature of 80 to 100° C., and the coating process and the heating and curing are performed once, or after the completion of one process, they are repeated 1 to 3 times.
The elastic pad according to claim 8, characterized in that: the comfort part and the support part are arranged sequentially along the thickness direction of the elastic body, wherein the unit cell structure of the comfort part and the support part The cells of the unit cell structure of the comfort part have the same size, or the cells of the unit cell structure of the comfort part are smaller than the unit cell structure of the support part. of cells, and/or the cell rod diameter of the unit cell structure gradually becomes smaller from the support part toward the comfort part, and/or the cell shape of the unit cell structure of the comfort part The cell shape of the unit cell structure of the support part is different.
The elastic pad according to claim 8, characterized in that: the comfort part and the support part are arranged sequentially along the width direction of the elastic body, wherein the cell size of the unit cell structure is from the comfort part It gradually becomes smaller toward the support part, and/or the cell rod diameter of the unit cell structure gradually becomes smaller from the support part to the comfort part.
The elastic pad according to claim 4, characterized in that: the elastic body includes a square inner core and a core sleeve formed on the outer periphery of the inner core, and the elastic resin layer is formed on the inner core or/and The core is sleeved.
The elastic pad according to claim 14, characterized in that: the core sleeve includes an upper sleeve layer, a lower sleeve layer, a front sleeve layer and a rear sleeve layer, wherein the upper sleeve layer and the lower sleeve layer are symmetrically arranged, and the The front casing layer and the rear casing layer are arranged symmetrically; or/and the porosity of the upper casing layer is less than or equal to the porosity of the inner core, and the porosity of the front casing layer is greater than or equal to the porosity of the upper casing layer. Porosity.
The elastic pad according to claim 1, characterized in that: the elastic body is prepared by 3D printing, and the change of one or more parameters of the elastic body is configured to adjust the porosity of each part of the elastic body. , the parameters include 3D printing temperature and laser power.
The elastic cushion according to any one of claims 1 to 16, characterized in that the elastic cushion is a seat cushion or an armrest cushion, wherein the comfort part and the support part are arranged from top to bottom.
The elastic pad according to any one of claims 1 to 16 is characterized in that: the elastic pad is a backrest pad, and the backrest pad has a plurality of the elastic support parts, which are a lumbar support part and a back support part, respectively, the lumbar support part and the back support part are arranged in the up and down directions and are integrally provided, and in any of the elastic support parts of the backrest pad, the comfort part and the support part are provided from front to back.
The elastic cushion according to any one of claims 1 to 16, characterized in that: the elastic cushion is a backrest cushion, and the backrest cushion has a plurality of elastic support parts, respectively a left backrest and a right backrest. The left backrest and the right backrest are arranged separately, and both the left backrest and the right backrest include one support part and two comfort parts respectively located on the left and right sides of the support part.
The elastic cushion according to any one of claims 1 to 16, characterized in that: the elastic cushion is a headrest cushion, and the headrest cushion includes one said support part and two said comfort parts, both of which are Each of the comfort parts is provided on the upper and lower sides of the headrest.
The elastic cushion according to any one of claims 1 to 16, characterized in that: the elastic cushion is a seat cushion, and the seat cushion has a plurality of elastic support parts, each of which is a rear support part distributed sequentially along the length direction. , the middle support part and the front support part, wherein the thickness of the seat cushion increases sequentially from the back to the front, and the porosity of the back support part, the middle support part and the front support part gradually becomes larger.
The elastic cushion according to claim 21, characterized in that: in a side projection of the seat cushion, the front support body and the rear support body are located at the left and right ends respectively, wherein the right side of the rear support body The contour edge is continuously bent inward and outward from top to bottom; and/or the left contour edge of the front support part is a rounded transition; and/or the upper contour edge of the middle support part and The lower outline edge is arranged symmetrically about the middle part, and the upper outline edge and the lower outline edge respectively extend linearly and obliquely from left to right.
The elastic cushion according to any one of claims 1 to 16, characterized in that: the elastic cushion is a seat cushion, and the seat cushion has a plurality of elastic support parts, each of which is a rear support part distributed sequentially along the length direction. , the middle support part and the front support part, wherein the thicknesses of the rear support part, the middle support part and the front support part are equal, and/or the rear support part, the middle support part and the front support part all include There are multiple support parts along the thickness direction, and the porosity of the support parts gradually becomes larger from bottom to top.
The elastic pad according to claim 23, characterized in that: the front support portion bends forward and downward; the elastic support force formed by the rear support portion is greater than the elastic support force formed by the front support portion, and the The elastic supporting force formed by the front supporting part is less than or equal to the elastic supporting force formed by the middle supporting part.
The elastic pad according to any one of claims 1 to 16, characterized in that: the elastic pad includes a comfort part located at the upper part and a support part located at the lower part; or, the elastic pad includes the comfort part located at the upper part. , the supporting part located in the middle part, and the other supporting part located at the lower part.
A human body support pad, characterized in that it includes the elastic pad according to any one of claims 1 to 23.